1137Mechanical EngineeringMedium
A heavy ladder resting on floor and against a vertical wall may not be in equilibrium, if________?
Athe floor and wall both are smooth surfaces
Bthe floor and wall both are rough surfaces
Cthe floor is rough, the wall is smooth
Dwill be in equilibrium under all conditions
Ethe floor is smooth, the wall is rough
Correct answer
A. the floor and wall both are smooth surfaces
Explanation
The correct answer is the floor and wall both are smooth surfaces.